Soap LookupService with Decentralized Adapter Engine

Hi Experts,
I would like to use a Decentralized adapter engine with the Lookup Service on PI 7.1 , but when try to use that, it doesn't work, because Lookup Service is default configure to use Central adapter only. I would like how to set a decentralize adapter.
How to do a Soap Lookup using a Decentral adapter?
Now, I use the following:
Channel channel = LookupService.getChannel("BC_SF_***","CC**");
SystemAccessor accessor = null;
accessor = LookupService.getSystemAccessor(channel);
Thanks in advance.
Fernando Pena.

You define in the communication channel, which adapter engine should be used, not in the mapping.

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